. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine . w andreproduce abundant-ly iu an artificial foodsolution consisting ofa dilute solution of Fig. 4.—Further development of the forms represented certain Salts, togetherin Fig. 3. .,, 6 with sugar. Conclusions.—What are the conclusions which may be legiti-mately drawn from the above facts ? That the essential part of yeast consists of cells of about thesize of mammalian blood-corpuscles, but with a limiting wallof a substance different from the inclosed contents, which latteris composed
. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine . w andreproduce abundant-ly iu an artificial foodsolution consisting ofa dilute solution of Fig. 4.—Further development of the forms represented certain Salts, togetherin Fig. 3. .,, 6 with sugar. Conclusions.—What are the conclusions which may be legiti-mately drawn from the above facts ? That the essential part of yeast consists of cells of about thesize of mammalian blood-corpuscles, but with a limiting wallof a substance different from the inclosed contents, which latteris composed chiefly of that substance common to all livingthings—protoplasm; that like other cells they reproduce their Fig. 2.—Various stages in the development of brewersyeast, seen, with the exception of the first in theseries, with an ordinary high power (Zeiss, D. 4) ofthe microscope. The first is greatly magnified(Gundlachs ^ immersion lens). The second seriesof four represents stages in the division of a singlecell ; and the third series a branching the light areas indicate Fig. 3.—The cndogonidia (ascospore) phase of repro-duction—i. e., endogenous division.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1890
